rebaseline_server live queries: allow comparison against summary files within the Skia repo

gm/rebaseline_server/compare_rendered_pictures_test.py

Index: gm/rebaseline_server/compare_rendered_pictures_test.py
diff --git a/gm/rebaseline_server/compare_rendered_pictures_test.py b/gm/rebaseline_server/compare_rendered_pictures_test.py
index 5ddaf1001786963182d5a1b281f9edc9ff28d572..c6e0e79c2b308757e0e5c426db68eba23658af36 100755
--- a/gm/rebaseline_server/compare_rendered_pictures_test.py
+++ b/gm/rebaseline_server/compare_rendered_pictures_test.py
@@ -68,6 +68,24 @@ class CompareRenderedPicturesTest(base_unittest.TestCase):
             results.KEY__HEADER__RESULTS_ALL),
         os.path.join(self.output_dir_actual, 'compare_rendered_pictures.json'))
 
+  def test_repo_url(self):
+    """Use repo: URL to specify summary files."""
+    results_obj = compare_rendered_pictures.RenderedPicturesComparisons(
+        setA_dirs=[
+            'repo:gm/rebaseline_server/testdata/inputs/skp-actuals/setA'],
+        setB_dirs=[
+            'repo:gm/rebaseline_server/testdata/inputs/skp-actuals/setB'],
+        image_diff_db=imagediffdb.ImageDiffDB(self.temp_dir),
+        image_base_gs_url='gs://fakebucket/fake/path',
+        diff_base_url='/static/generated-images',
+        setA_label='setA', setB_label='setB')
+    results_obj.get_timestamp = mock_get_timestamp
+
+    gm_json.WriteToFile(
+        results_obj.get_packaged_results_of_type(
+            results.KEY__HEADER__RESULTS_ALL),
+        os.path.join(self.output_dir_actual, 'compare_rendered_pictures.json'))
+
   def _generate_skps_and_run_render_pictures(self, subdir, skpdict):
     """Generate SKPs and run render_pictures on them.